http://www.slate.com/articles/news_and_politics/politics/2015/05/racism_in_real_estate_landlords_redlining_housing_values_and_discrimination.html

In 1934, Homer Hoyt wrote a dissertation—“One Hundred Years of Land Values in Chicago: The Relationship of the Growth of Chicago to the Rise of Its Land Values, 1830–1933”—that ranked various races and nationalities by order of “desirability.” Most desired were the old American stock of Anglo-Saxons and Northern Europeans—English, Germans, Scots, Irish, and Scandinavians—followed by Northern Italians, Czechoslovakians, Polish, Lithuanians, Greeks, “Russian Jews of the lower class,” South Italians, and at the bottom of the list, “Negroes and Mexicans.”